Glossary

Clear, practical definitions for wire, tube, strip, cable, and profile processing.

Technical dictionary

D terms

10 terms beginning with D

D

Danger areaZones on straighteners and wire processing lines where operators risk crushing or clamping injuries — identified in the documentation and guarded by hoods, covers, paneling, or enclosures.

Decoil-straightenerA combination of a decoiling/unspooling unit and a straightening unit with a material store, in which the material is paid off dynamically at constant pull-off force to avoid torsional stresses and helicities.

DeflectingRedirecting the process material during production and processing — deflection must remain elastic and follow the direction of the initial curvature, which sets a permissible minimum deflecting roll diameter.

DeflectionThe deflection h of a product to be straightened is the maximal distance between the chord and the arc of the product, expressed as mm per reference length.

Diagnosis unitA device that determines select material parameters of a wire (elongation limit, modulus of elasticity, modulus of hardening, Bauschinger modulus, etc.) through bending tests, providing the inputs a simulation program needs to describe a straightening process virtually.

Drawing direction in the straightening processThe direction in which a wire was drawn leaves a directional microstructure ('drawing texture'); straightening tests show final curvatures differ by pull-through direction, so difficult wires are best straightened in the drawing direction.

Drawing ironA historical forged tool with several conical drawing holes, used to draw iron before modern drawing dies existed.

Drawing processThe forming of a process material by drawing, based on the wedge principle: the normal force at the drawing hole — four to seven times the drawing force — performs the forming mainly through radial and tangential compressive stresses.

Drawing shoeAn old device that applied lubricant to the material before it entered the drawing iron, reducing wear and the force needed for drawing.

Drive unitA feeding device that clamps endless material between pairs of driven rolls or caterpillars and uses motor power to pull or push it through the process — with contact force set high enough to prevent slippage but low enough to avoid plastic deformation and surface damage.